The ostrich is the largest and heaviest bird currently living on Earth. Despite its size, it can run with the speed of 70 km/h (43 mph) making even five-meter steps. It is also very rarely the prey of predators.
Measured at 20 ft 3 in (6.17 m), and weighed 2,370 lbs (1,075 kg), Lolong was the largest crocodile in captivity. He was also the biggest crocodile ever measured from snout-to-tail. Lolong was an Indo-Pacific or saltwater crocodile (Crocodylus porosus).
https://news.nationalgeographic.com/2016/03/160322-whale-sharks-animals-science-oceans-biggest.html The World's Largest Whale Sharks Are Disappearing Scientists are spotting fewer of the biggest whale sharks in global oceans, but no one is sure why.
The Largest Land Carnivores in the World: The Polar Bear and Kodiak Bear The largest living land carnivores are the Polar Bear (Ursus maritimus) and the kodiak bear, a Brown Bear (Ursus arctos) subspecies.
Giraffes are the tallest animals in the world. Males can grow up to 18 feet (5.5 meters) tall, females can reach 14 feet (4.3 meters) tall and their babies, called calves, are born six feet (1.8 meters) tall.
Elephants are the world’s largest land animals now living. The largest elephant ever recorded was shot in Angola in 1956. This male weighed about 24,000 lb (11,000 kg), with a shoulder height of 3.96 meters (13.0 ft), a metre (yard) taller than the average male African elephant.
Colossal Squid The Colossal Squid is a creature borne from the nightmares of people with sea-phobia all over the world. The Colossal Squid for a long time wasn’t even verified to exist but now we know it as the largest squid in the ocean.
By considerable measure, the largest known animal on Earth is the blue whale. Mature blue whales can measure anywhere from 75 feet (23 m) to 100 feet (30.5 m) from head to tail, and can weigh as much as 150 tons (136 metric tons).
Although man may be responsible for some of the changes that the Earth is now undergoing, when it comes to physical size, humans are nowhere near being the largest creatures on the planet. While you may think to yourself that of course there are fishes, primates, and other animals that are a lot bigger than humans, in this list we’re going to see some creatures that are larger than trees, boats, and even houses.
The Chinese giant salamander is the largest amphibian on Earth. While the average size for the species is around 3.5 feet, one salamander in the wild measured out to an astonishing 5.9 feet, which is a record for this species.